Creating new root volume

[David G. Douthitt]

I have (I thought) completed all the tasks that are usually recommended to create a new root volume on an Integrity server. I started with an apparently preconfigured EFI-partitioned disk, and set about to create all of the LVM structures and boot parameters.

I used lvlnboot to set things right, copied the efi data, created root and swap in the right places with strict allocation and no block relocation - and compared the logical volumes with the working boot disk in the system.

Booting with the new disk, EFI reports no HPUX file system found in partition 2 (!) whereas I can mount every filesystem there in HPUX, and I can utilize the swap created there.

Every check inside HPUX seems to come up clean; it's just the EFI boot process that fails (is THAT all?!).

The goal is to increase the primary swap partition size.

Should I really start this over from scratch or is this recoverable somehow?

[Steven E. Protter]

Shalom,

I create a new root volume by making a make_tape_recovery or make_net_recovery of the root volume group.

I then restore that volume intervening at the Ignite prompt to alter filesystem and swap sizes.

IF all you want is more swap, just add a secondary swap area and save yourself some hard work.

SEP

[James R. Ferguson]

Hi David:

Perhaps Appendix-A of:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

...will guide you. I'd start over.

Regards!

...JRF...

[David G. Douthitt]

I already added secondary swap (on the same disk) but am thinking that this is less than optimal. I currently have 8G primary + 24G secondary and am trying to combine them together onto a single volume.

[James R. Ferguson · Accepted solution]

Hi (again):

> I currently have 8G primary + 24G secondary and am trying to combine them together onto a single volume.

Why? There is no need to do this. A secondary device swap is just as good as a primary one. If the two swap devices are on the SAME physical volume (vg00), then make the swap priority of the secondary swap different than that of the primary. SHould you ever actually do I/O to the devices, interleaving equal priority swap devices would cause disk head movement between to the detriment of your already degraded performance!

Regards!

...JRF...

[David G. Douthitt]

Changing the priority of the swap devices is an excellent idea! Thanks!

You answered the question behind the question :-)

[David G. Douthitt]

The final answer is that there is no reason not to stick with primary and secondary swap; the speed degredation is answered by a change in priority.

[Torsten.]

Hi David,

"create a new root volume" - did you mirror the disk?

This is not clear to me.

Please clarify.

You can easily do wrong steps while mirroring ...